ATOMIC AND MOLECULAR PHYSICS |
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A Phenomenological Model for Decay Process of Long-Persistent Phosphorescence |
CHEN Bin1, HAO Hong-Chen2, ZHU Jiang2, LU Ming2**
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1Department of Physics, Fudan University, Shanghai 200433
2Department of Optical Science and Engineering, Fudan University, Shanghai 200433
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Cite this article: |
CHEN Bin, HAO Hong-Chen, ZHU Jiang et al 2011 Chin. Phys. Lett. 28 053201 |
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Abstract A sum of two or more exponential decay functions is empirically adopted nowadays to analyze the decay curve of long-persistent phosphor. However, the fitting parameters of this empirical model lack well-defined physical meanings, especially when the number of exponential decay function is greater than two. We propose a phenomenological model to describe the decay curve of long-persistent phosphor based on an analysis of the relationship between carrier concentration and light-emitting intensity. This model has a few fitting parameters with well-defined physical meanings as compared to the current empirical one. With this model, we quantitatively analyze the decay processes of typical long-persistent phosphors of SrAl2O4:Eu,Dy and obtain reasonable fitting results.
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Keywords:
32.50.+d
33.50.-j
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Received: 02 March 2011
Published: 26 April 2011
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PACS: |
32.50.+d
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(Fluorescence, phosphorescence (including quenching))
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33.50.-j
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(Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion))
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